A Very Ugly Xenoform
The VUX are a race, that to an Earthling resembles a bipedal, one-eyed cross between a hideous green octopus and an anteater. Captain Jeffry L. Rand who first encountered them joked about the name VUX meaning Very Ugly Xenoform unaware that the VUX translator devices were already operating and relayed these words to the VUX captain, thus ending the first contact in catastrophe.
However it is later learned that Peaceful coexistence with humanity and the VUX would have been a pipe dream nonetheless. This is because the bigoted VUX think Humans are simply too UGLY to be left alive. Whenever a VUX views an Earthling, he is forced to regurgitate violently...
Fact is that in VUX culture, concepts of appearance and fashion are of tantamount importance, and their mindset seems to be stuck in a "Victorian England" -kind of thinking. To their eyes a lifeform as bizarre looking as a humanoid is a new dimension in horrifying ugliness, a monster. So it's no surprise that they view the other humanoid races, Syreen, Androsynth and Arilou with equal disgust.
There is, however, a VUX who doesn't share these views - in fact, he actually enjoys the presence of human beings. To say even more, even some humans can consider his passion for humans and other alien beings a bit perverted - needless to say how do the other VUX feel about it. His name is Admiral ZEX, and he commanded the VUX fleet during the War with the Alliance of Free Stars. After the War ZEX and his few followers were exiled to the planet Alpha Cerenkov I to keep them away from the rest of the VUX society.